Evaluation fixed.

examples/run_lm_finetuning.py

@@ -86,7 +86,6 @@ class TextDataset(Dataset):
             # Note that we are loosing the last truncated example here for the sake of simplicity (no padding)
             # If your dataset is small, first you should loook for a bigger one :-) and second you
             # can change this behavior by adding (model specific) padding.
-            self.examples.append(tokenizer.build_inputs_with_special_tokens(tokenized_text[-block_size:])) # DIRTY!
 
             logger.info("Saving features into cached file %s", cached_features_file)
             with open(cached_features_file, 'wb') as handle:
@@ -543,4 +542,4 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    main()